2600/2700 SERIES

2600/2700 Series General Purpose 1/4-Turns.

A wide choice of general purpose studs and receptacles are available with this series. Certain 2600 and 2700 series 1/4-turn fasteners are qualified to MIL-F-5591* specifications. Also included are receptacles for fast installation, or for ultrasonic installation. Integral stud cup protects top panel surface from abrasion. 2600 Series. Plus flush head styles and solid retaining rings.  2700 Series. Flush head styles and split retaining ring.   Specifications: Ultimate tensile strength: 300 lbs. Working strength: 200 lbs *Meets the design, physical and performance requirements of MIL- F-5591. However, full mechanical properties testing may not be performed on each production lot. Retaining rings are used with stud lengths -5 and greater, except for snap-in versions which do not require retaining rings.

Ordering Information

Note: Receptacles determine which stud is selected, therefore, an overview is included here. To Select Stud Part Number. 1. Stud part number varies with receptacle used. The receptacle must be chosen before selecting stud part number. See receptacle detail on Pages A-27 through A-30. 2. Determine “G” thickness as shown in drawings below. Important Note: If the total thickness “G” is very near the top of the thickness range, selection of the next greater dash number is recommended. For the other materials and for “G” thickness greater than those tabulated, contact the Camloc Products Division. Notes: a) Increase “G” to allow for thickness of paint or other finishes and for the compressed thickness of any b) ”G” must be increased for the following “special” conditions:

“Special” Condition Increase “G” Thickness
212-12B Series  receptacles installed Add .038 inch
Front mounting receptacle (P/N 26R41-1-1AA) installed Allow .022 inch for receptacles top side protrusion
Rear mounting receptacle (P/N 26R45-1-1AA) installed Allow .018 inch for receptacle top side protrusion
Clip-on  receptacle (P/N 99R11) installed Add .090 and subtract 7 dash numbers
Single  hole mounting receptacle (P/Nos. 99R10  and 99E10)   Add .020 inch
KNQ2  Series.  Keenserts installed Add .030 inch


  1. Locate “G” total thickness in the tables with each stud.
  2. Then find the corresponding stud part number in the column

designated for the selected receptacle. Example 1. Stud Assembly Used: 2700-[ ] “G” Total Thickness = .275 inch Receptacle Used: 212-12AD Stud Dash Number From Table: -9 Complete Part Number: 2700-9 Example 2. Stud Assembly Used: 2600-[ ] “G” Total Thickness =.163 inch Receptacle Used: 212-12BR Required Calculation: “G” + .038 = .163 + .038 = .201 Stud Dash Number Selected From Table: -6 Complete Part Number: 2600-6S

Stud  Dash  Number Selection
  “G” Th Total ss Receptacles
26R1 26R2 26R5 312-12 All Other P/N’s Not Tabulated
.030-.059 – 2* – 1*
.060-.089 – 3 – 2*
.090-.119 – 4 – 3
.120-.149 – 5 – 4
.150-.179 – 6 – 5
.180-.209 – 7 – 6
.210-.239 – 8 – 7
.240-.269 – 9 – 8
.270-.299 -10 – 9
.300-.329 -11 -10
.330-.359 -12 -11
.360-.389 -13 -12
.390-.419 -14 – 1* -13
.420-.449 -15 – 2* -14
.450-.479 -16 – 3 -15
.480-.509 -17 – 4 -16
.510-.539 -18 – 5 -17
.540-.569 -19 – 6 -18
.570-.599 -20 – 7 -19
.600-.629 -21 – 8 -20
.630-.659 -22 – 9 -21
.660-.689 -23 -10 -22
.690-.719 -24 -11 -23
.720-.749 -25 -12 -24
.750-.779 -26 -13 -25
.780-.809 -27 -14 -26
.810-.839 -28 -15 -27
.840-.869 -29 -16 -28
.870-.899 -30 -17 -29
.900-.929 -31 -18 -30
.930-.959 -32 -19 -31
.960-.989 -33 -20 -32
.990-.1.019 -34 -21 -33
1.020-1.049 -35 -22 -34
1.050-1.079 -36 -23 -35
1.080-1.109 -37 -24 -36
1.110-1.139 -38 -25 -37
1.140-1.169 -39 -26 -38
1.170-1.199 -40 -27 -39
1.200-1.229 -41 -28 -40
1.230-1.259 -42 -29 -41
1.260-1.289 -43 -30 -42
1.290-1.319 -44 -31 -43
1.320-1.349 -45 -32 -44
1.350-1.379 -46 -33 -45
1.380-1.409 -47 -34 -46
1.410-1.439 -48 -35 -47
1.440-1.469 -49 -36 -48
1.470-1.499 -50 -37 -49
1.500-1.529 -38 -50
1.530-1.559 -39
1.560-1.589 -40
1.590-1.619 -41
1.620-1.649 -42
1.650-1.679 -43
1.680-1.709 -44
1.710-1.739 -45
1.740-1.769 -46
1.770-1.799 -47
1.800-1.829 -48
1.830-1.859 -49
1.860-1.889 -50


*2700 Series studs with -1 or -2 lengths require special part numbers; contact Camloc Products Division.

Note: Part numbers shown are basic part numbers only. See ordering information on Page A-23 for required dash numbers.
Material Part No.1 Part No. Part No. Part No. Part No.
Stainless Steel 2600-[ ]S 26S51-[ ] 26S82-[ ]-3BB
Stainless Steel (Non-Magnetic)   26S26-[ ]   –   –   –   –
Steel (Cadmium Plated) 2600-[ ] 26S8-[ ] 26S82-[ ]-3AA
Steel (Cadmium Plated, Clear Chromate)   –   –   –   –   –
Steel (Nickel Plated) 26S42-[ ] 26S39-[ ]
Steel (Satin Black Enamel) 2600-[ ]B 26S8-[ ]B
Steel (Chrome Plated) 26S38-[ ]
Steel (Zinc Plated) 26S103-[*]-1AA 26S107-[*]-1AA
Steel (Black Phosphate Coated)   –   26S103-[*]-1AB   –   26S107-[*]-1AB   –
A286 CRES (Passivated) 26S51-[ ] B


260 0 Studs continued Knurled Head Folding Wing Folding Bail Handle External Hex Snap-In Style
Material Part No. Part No. Part No. Part No.
Stainless Steel 26S22-[ ]B
Steel (Cadmium Plated) 2600-[ ]KA 26S13-A-[ ] 26S22-[ ]
Steel (Cadmium Plated, Clear Chromate) 26S13-B-[ ]
Steel (Zinc Plated, Clear Chromate)   26S135-[*]-1A

*Stud lenghts to -15.
1. For Beryllium Copper material specify Part No. 26S26-[ ]B.
2. For Slotted Knob style in Steel (Cadmium Plated) use Part No. 26S34-[ ]D.
Maximum Service Temperature: Stainless Steel—700°F.; Plastic Knobs—300°F.; all others—450°F.


Ultimate tensile strength: 300 lbs. Working strength: 200 lbs. Stud grip increments: .030 inch. For other styles, materials or finishes, please contact Camloc Products Division.


Hex Socket Fixed Wing Knurled Knob Knurled Head
Part No. Part No. Part No. Part No. Part No.
2600-[ ]SW
26S36-[ ] 26S26-[ ]A
26S97-[ ]-1AA 2600-[ ]W 2600-[ ]K
26S34-[ ]B 26S35-[ ]
26S37-[ ] 26S40-[ ]
26S34-[ ]A
26S34-[ ]

Plastic Knob Styles

Shank Material: Steel (Zinc Plated)
Black Red Grey Beige
T-K nob 26S98-[ ]-1DA 26S98-[ ]-1DB 26S98-[ ]-1DC 26S98-[*]-1DD
T-K nob (Snap-In) 26S109-[*]-1AA 26S109-[*]-1AB 26S109-[*]-1AC 26S109-[*]-1AD
K nurled K nob 26S99-[ ]-1DA 26S99-[ ]-1DB 26S99-[ ]-1DC
K nurled K nob (Snap-In) 26S110-[*]-1AA 26S110-[*]-1AB 26S110-[*]-1AC

*Stud lengths to -15.

2600/2700 Series. General Purpose Stud Assemblies.

Note: Part numbers shown are basic part numbers only. See ordering information on Page A-23 for required dash numbers
Material Part No. Part No. Part No. Part No. Part No.
Stainless Steel 2700-[ ]S
    Steel (Cadmium Plated) 2700-[ ] 27S17-[*]-1AC 27S3-[ ] 27S18-[*]-1AC 27S8-[ ]-1AA Per NAS1078
27S8-[ ]-3AA Per NAS4000
27S8-[ ]-4AA Hi-Torque Recess
Steel (Satin Black Enamel) 2700-[ ]A 27S3-[ ]A
Steel (Chrome Plated) 2700-[ ]B 27S17-[*]-1AB 27S18-[*]-1AB
Beryllium Copper (Non-Magnetic) 27S12-[ ]-1BB
Steel (Zinc Plated) 27S17-[*]-1AA 27S18-[*]-1AA

Maximum Service Temperatures: Stainless Steel—700°F; Steel and Bryllium Copper—450°F.

Retaining Rings (for 2600/2700 Series)

Solid rings are used to hold stud assemblies stationary to the top panel. Split ring allows stud assemblies to move freely within the top panel.

Notes:  1.   Order separately.
2. Retaining rings are required for stud length dash numbers “5” and greater.
3. Studs with smaller dash numbers are self-captivating and retaining rings are not
4. Please see page A-33 for installation procedures for split

Ma te ri a l (F i ni sh) S ta i nle ss  S te e l
2 6 0 0 -LW-7 2 6 0 0 -S W
S te e l (C     S te e l (Z a d mi um) E le ctro  P la te d   2 6 0 0 -LW*   2 7 S 5 -1   2 6 0 0 -S W2
Me cha ni ca l P la te d 2 6 0 0 -LWM 2 7 S 5 -1M
i nc)   9 9 W10 -0 1A 1*   –   9 9 W11-0 1A 1
E le ctro  P la te d
Me cha ni ca l P la te d 9 9 W10 -0 1M1
We i g ht  p e r 10 0  p i e ce s 0.0 4  lb s. 0.0 4  lb s. 0 .0 3  lb s.
  Insta lla ti o n To o l Re q ui re d   T9 8 -1   T9 8 -1 Use ne e d le  no se  p li e rs F o r mo re  i nfo rma ti o n se e  P a g e  A -3 3

*Not  recommended  for  use  with  Stud  Ejector  Springs.  Use  2600-SW. Maximum Service Temperatures: Stainless Steel—700°F.; all others—450°F.

Retaining Ring Installation Tool T98-1 (For use with Solid Rings Only)

Stud Ejector Springs

Provides for retraction of stud assembly to allow opening and closing of equipment without the possibility of jamming or damage. Select the ejector spring corresponding to stud assembly series selected. See table for part numbers.


U s e w i t h  2 6 0 0 S e r i e s

S t u d  A s s e m b l i e s

U s e w i t h  2 7 0 0 S e r i e s

S t u d  A s s e m b l i e s

X   D i a m e t e r . 4 3 8 ( Re f . ) . 5 0 0 ( Re f . )
P la i n Ri ve t Ho le s 2 6 0 0 – E S —-
D i m p le d Ri ve t Ho le s 2 6 0 0 – E S D 2 7 0 0 – E S D
W e i g ht p e r 1 0 0 p i e c e s 0 . 8 3 1 lb s . 0 . 9 4 1 lb s .
M a t e r i a l a nd F i ni s h S p r i ng S t e e l ( C a d m i um p la t e d g o ld c hr o m a t e )
M a xi m um S e r vi c e

Te m p e r a t ur e

4 5 0  F. 4 5 0  F.

Notes:1. Thru hole in Ejector Spring Part Number 2700-ESD is formed to allow 2700 Series Stud Assemblies to seat flush to top surface of Ejector Spring.
2. Add .018 to total “G” thickness when using these parts.

Receptacles for Fast Installation Front Mounting Version Part Number: 26R41-1-1AA

Rear Mounting Version Part Number: 26R45-1-1AA

MATERIAL: cage: carbon steel, (zinc plated); receptacle element: zinc diecasting, (zinc plated).

Clip-on Version Part Number: 99R11-1-1AA

MATERIAL: carbon steel clip (zinc plated); zinc alloy insert (zinc plated); steel retaining ring.

Ultrasonicaly Installed Version Installs into Thermoplastics.

MATERIAL: zinc alloy (zinc plated).





LONG 26R48-1-1AA .500
SHORT 26R48-2-1AA .30


Note: When selecting studs for short version (26R48-2-1AA) receptacle, subtract .200 in. from total grip.

Receptacles. (For use with 2600/2700 and 26F Series Stud Assemblies).

Standard Mounting Versions



Narro w Wid th

En cap su lated See Note 1 For Sealing




Part No.


Max. Temp.




Weight (per 100 pcs.) (lbs.)  

Part No.


Max. Temp.




Weight (per 100 pcs.) (lbs.)  

Part No.


Max. Temp.




Weight (per 100 pcs.) (lbs.)
Stainless  Steel (Non-Mag  — Passivated) 212-12S 750 F. Plain 1.05 26R18-1 750 F. Plain 1.63
212-12SD 750 F. C’Sunk 1.00 26R18-2 750 F. C’Sunk 1.63
Silicon Bronze

(Cadmium  Plated)

212-12 450 F. Plain 1.21 212-12N 450°F. Plain 1.17 26R16-1 300 F. Plain 1.63
212-12D 450 F. C’Sunk 1.16 212-12ND 450°F. C’Sunk 1.12 26R16-2 300 F. C’Sunk 1.63
Silicon Bronze

(Nickel Plated)

212-29 450 F. Plain 1.21

(Zinc Plated)

212-12E 300 F. Plain 1.21
Aluminum  Alloy


212-12A 350 F. Plain .40
212-12AD 350 F. C’Sunk .38
Aluminumm Alloy

(Hard Anodized)

212-12A-H 350 F. Plain .40

Lightw eight

Low Profile Restricted usage (see Note 2)


Material Part


Max. Temp. Rivet




Max. Temp. Rivet




Max. Temp. Rivet




Stainless Steel

312-12A 750 F. Plain .134 dia.


312-12S 750 F. Plain .102 dia.


312-12WS 750 F. (W Nonibs)

eld N




(Cadmium Plated)

26R6-1BB 450 F. Plain 312-12 450 F. Plain .102 dia.


26R6-4BB 450 F. C’Sunk
26R6-6BB (Narrow Width)  

450 F.



Aluminum Alloy


26R8-1 350 F. Plain
26R8-2 350 F. C’Sunk

Notes:   1.  Encapsulated receptacle may be sealed against air, water, and dust by using 3M brand EC847 or a silicon adhesive sealant.

2. Use of 312-12 low profile receptacles is restricted to applications with total “G” thickness of .390 inch and Please see illustration

Receptacles (continued)

Side Mounting Versions


Material Part


Max. Temp. Part


Max. Temp. Part


Max. Temp. Part


Max. Temp.

(Cadmium Plated)











Receptacle Element: Silicon Bronze

Bracket: Stainless Steel











212-12B For Welding Attach- ment (no rivet holes)  


Aluminum Alloy












Aluminum Alloy

(Hard Anodized)













Corner Mounting Versions





Max. Temp.
Aluminum Alloy






Aluminum Alloy

(Hard Anodized)





Floating Version

(Float = ±.030)





Max. Temp.
Insert Element:

CRES per ASTM A167



CRES per ASTM A743






Special Purpose Receptacles

For use in aluminum and magnesium castings and other thick materials.
Drill, counterbore, and then tap thread in structure using data from table below. Turn KEENSERTS Insert into tapped hole using installation tool P/N TQ-2A

for positive depth control. Drive locking kees down into the tapped threads of the structure using tool P/N TQ-2B. This provides a positive mechanical lock against rotation.

Installation Data

Part Numbers  

Tap Drill



Tap Drill Depth Min.







Min. Full Thread Depth  



Removal Data














.500 Dia. x

.055-.035 Depth














Removal: In the unlikely event it becomes necessary to remove the KEENSERT Insert, simply drill to the indicated depth, deflect the locking kees inward and break them off. Then remove insert with an E-Z out type tool. An identical insert can now be installed in the original hole without rework.

Single Hole Mounting Receptacles Designed to allow mounting in dimpled or drilled and countersink holes. Can also be installed in tapped holes. Blind end version is ideal when receptacle is to be used with structural foams.




Part Number


Material/ Finish


Max. Temp.






Zinc with

Zinc Plating

300°F. 1.04












Steel (Zinc Plated, Clear Chromate)  





15R10-1AC Solid Version

Steel (Cadmium Plated, Clear Chromate)  




Installation Options Drilled Panel

Dimpled Panel
Drill .406 Dia. hole, then form to shape illustrated.

Optional Hole Shapes

Notes: 1. “D” and double “D” shaped holes provide a positive stop against rotation.
2. When using round mounting holes, retainer nut must be securely tightened to prevent rotation of

Panel Preparation and Installation Data
2600 Series Protruding Head Studs

Determine panel thickness “P” and form through hole to corresponding “X” diameter. Note: Panels with thicknesses greater than .125 inch must be back counterbored to a concentric .375 inch diameter with a remaining maximum material thickness of .125 inch. Use split style retaining rings with back counterbore.

P X Dia. Ref.
.030 to .065 .257
.066 to .125 .281

To provide float for stud assembly, increase “X” diamater to .312 inch. This hole diameter allows “P” thickness to be increased to .187 inch without back counterboring. Larger hole requires used of solid retaining ring, P/N 2600-LW.
2600/2700 Series Snap-in Studs

Form through hole to .260-.256 diameter. Note: Panels with panel thicknesses greater than .078 must be back counterbored to a concentric .375″ diameter with a remaining maximum thickness of .078.

2700 Series Flush Mounting Studs Installation in “Thin” Panel
For panel thicknesses “P” up to .072 inch maximum, form through hole to .213 diameter. Then dimple using tools shown below.  Through hole after dimpling to be .257; ream if necessary.

Installation in “Thick” Panel

For panel thickness “P” larger than .072 inch, form through hole to .257 diameter and 100° C’Sink to a diameter of .437. Panels with thicknesses greater than .140 inch must be back counterbored to a concentric .375 inch diameter with a remaining material thickness of .140 inch maximum. Use split style ring with back counterbore.

Installing Stud Into Panel

Compress stud assembly spring using Camloc pliers, P/N 4P3, as shown. Insert stud into panel and release when cross pin clears panel.

Typical Installations
Note: If float is required, all dash lengths require retaining rings as described in “Float” above.

Receptacle Installation Data

Standard Mounting Versions
1. Drill #30 (.1285) pilot hole.
2. Drill holes for .093 rivets using drill jig P/N T12 or equivalent..
3. Enlarge pilot hole to X diameter and countersink if required.
4. Rivet receptacle in place.

Important Note: 1100 F aluminum alloy rivets should be used with aluminum receptacles.
Typical Installation
(Thin panels may be dimpled)

Receptacle “X” Dia. C’Sink Hole Saw*

P/N’s 26R16-1,





90° x 500 Dia.




All Other Standard

Mount Receptacles




None Required

HS-500 or


* Hole Saws are available as a convenience in selected sizes.
Drill Jig T12
Provides convenient means for accurately locating rivet holes with .750 inch spacing relative to stud mounting hole.

Hole Saws
Accurately sizes mounting holes Availble with either a smooth or drill bit pilot.

Side Mounting Versions ,26R1 and 26R3 Aluminum Receptacles
Important Note: 1100F aluminum alloy rivets should be used with aluminum receptacles.

26R5 Lightweight Receptacle

212-12B Silicon Bronze Receptacles

26R2 Aluminum Corner Mounting Receptacle

Important Note: 1100 F aluminum alloy rivets should be used with aluminum receptacles

Front Mount Version, Part Number 26R41-1-1AA
No riveting or special tools required.


Rear Mount Version, Part Number 26R45-1-1AA
No riveting or special tools required.

Clip-on Version Part Number 99R11-1-1AA

Designed to clip-on .060 thick x .900 wide inner frame. Add .090 to panel thickness used to deter- mine total grip, “G” select stud dash number, then subtract seven dash numbers. Requires .438 diameter installation hole.


Ultrasonically Installed Versions Part Number 26R48-1-1AA/26R48-2-1AA

1.To be used as a guide only. To obtain optimum performance, final hole size should be determined for particular application.
2. See Page A-23 for “G” total thickness for stud length selection. When using 2600-LW or 99W10 type solid ring retainers, a .018 inch gap between panel and frame will occur. Increase “G” total thickness by .018 inch. To eliminate gap, refer to table for options.

To Eliminat e Gap Incr ease   G   Thickness
Mold or drill a counterbore into frame, .590 inch min. diameter by .020 inch deep, and install receptacle to this depth.*  


Add .020 inch.

Counterbore  underside of panel .475 inch min. diameter by .020 inch deep.  

No increase required

*Welding horn must be.590   diameter. .560

Retaining Ring Installation 

1. To install, place retaining ring on stud with slot aligned over left side of cross pin as shown on figure
2. Snap retaining ring under cross pin using needle nose pliers, then rotate retaining ring 180° until ring is over right side of cross pin as shown on figures 2 and 3
3.To complete installation, snap retaining ring over the right side of cross
4. Completed installation is shown in figure

Retaining Ring Installation Tool T98-1

(For use with Solid Rings Only)


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