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NAS1580-NAS1581

BOLT, 100º FLUSH HEAD

NAS1581

 

.

ness 

DAsH

no.

TFIR

EAD UNJF-3A

A DIA MAX

(b)

BDIA MIN  

MAX

(b)

 

REF

(b)

M

GAG- E   PROT

(*)

N P DIA R RAD T U REF V GAG-  

Y  TIR

Z

(e)

‹1)
Plate-

d

Un- Plate- d
-3 .1900-32 .3813 .339 .1895

.1885

.1895

.1890

.O15 .083 .0285

.0255

.126

.106

.080

.070

.035

.015

.363 .050 .3147

.3145

.005 .OO4O 3,180
-4 .2500-28 .5066 .464 .2495

.2485

.2495

.2490

.015 .111 .0351

.0319

.126

.106

.086

.076

.035

.015

.403 .050 .4245

.4243

.OO6 .OO3O 5,790
-5 .3125-24 .6335 .578 .3120

.3110

.3120

.3115

.015 .140 .0409

.0370

.130

,110

.086

.076

.045

.025

.501 .060 .5389

.5387

.OO7 .OO3O 9,260
-6 .3T50-24 .7604 .71T .3745

.3735

.3745

.3740

.015 .16T .0459

.0422

.130

,110

.116

.106

.045

.025

.594 .060 .6532

.6530

.008 .0025 14,000
-7 .4375–20 .8884 .826 .4370

.4360

.4370

.4365

.022 .195 .0470

.0425

.134

.114

.116

.106

.055

.035

.675 .080 .7784

.7782

.009 .0025 ]9,OOO
-8 .5000-20 1.01-

39

.951 .4995

.4985

.4995

.4990

.O22 .222 .0529

.0482

.134

.114

.116

.106

.055

.035

.768 .080 .8902

.8900

.OIO .0020 25,600
-9 .5625-18 1.14-

08

1.071 .5615 .5605 .5615 .5610 .O25 .250 .0590 .0541 .134 .114 .151 .141 .055 .035 .881 .090 1.00- 28

1.00- 26

.010 .0020 32,400
-10 .6250-18 1.27- 1.201 .6240

.6230

.6240

6235

025 .280 .0683

.0631

.134

.114

.151

.141

.055

.035

 

.981

 

.090

1.11-24 1.11-22  

.010

 

.0020

 

40,900

 

 

FIRST DASH NO.

 

RECESS

NO.

 

J

MAX

w

D MAX

GAGE

PENETRATDN

Recess

Torque

In. Lbs. Min

MIN MAX
-3 10 .090 .248 .0560 .0685 50
-4 1/4 .118 .325 .0750 .0890 125
-5 5/16 .122 .357 .0700 .0860 250
-6 3/8 .145 .427 .0850 .1030 430
-7 7/16 .169 .498 .1005 .1205 925
-8 1/2 .193 .568 .1155 .1375 1210
-9 9/16 .217 .638 .1305 .1545 1760
-10 5/8 .241 .708 .1450 .1710 2460

 

 

FIRST DASH NO.

 

RECE- SS NO

J  

K

REF

 

W

REF

Recess Torque In. Lbs.

Min

MIN MAX
-3 3 .042 .045 .305 .110 50
-4 4 .051 .054 .422 .134 125
-5 5 .061 .064 .490 .160 250
-6 6 .084 .088 .639 .198 430
-7 7 .096 .100 .715 .224 925
-8 8 .101 .105 .766 .256 1210
-9 9 .114 .118 .877 .300 1760
-10 10 .137 .141 1.020 .344 2460

MATERIAL:

ALLOY STEEL -4140 PER MIL-5-5626, 4340 PER MIL-5-5000 OR 8740 PER MIL-5-6049. 6AL-4V TITANIUM ALLOY PER AMS4928 OR AMS4967. A-286 CRES PER AMS5731 , AMS7532 OR AMS5737 (SEE “CODE”).

HEAT TREAT:

ALLOY STEEL:  160,000 – 180,000 PSI MINIMUM TENSILE STRENGTH.
A-286 CRES: 160,000 – 180,000 PSI MINIMUM TENSILE STRENGTH.z
6AL-4V Ti: 160,000 – 180,000 PSI MINIMUM TENSILE STRENGTH.

FINISH:

PASSIVATE PER QQ-P-35 OR CADMIUM PLATE PER QQ-P 416, TYPE II, CLASS 2, (SEE “CODE”)

CODE:

FIRST DASH NUMBER INDICATES NOMINAL DIAMETER IN 16THS. SECOND DASH NUMBER INDICATES GRIP LENGTH IN 0.625 INCH INCREMEMNTS.

MATERIAL:

CODE LETTER “A” FOLLOWING BASIC PART NUMBER INDICATES ALLOY STEEL. CODE LETTER “C” FOLLOWING BASIC PART NUMBER INDICATES A-286 CRES. CODE LETTER “V” FOLLOWING BASIC PART NUMBER INDICATES 6AL-4V TITANIUM.

FINISH:

ALLOY STEEL: TYPE II, CLASS 2, CADMIUM PLATE. A-286 CRES: NO CODE LETTER FOLLOWING SECOND NUMBER INDICATES PASSIVATE. CODE LETTER “P” FOLLOWING SECOND DASH NUMBER INDICATES TYPE II, CLASS 2, CADMIUM PLATE. 6AL-4V Ti: NO FINISH.

RECESS:

CODE LETTER “H” FOLLOWING FIRST DASH NUMBER INDICATES HI-TORQUER RECESS PER MS33750 CODE LETTER “R” FOLLOWING FIRST DASH NUMBER INDICATES TORQ-SET RECESS PER MS14191 FOR CODE LETTER “T” FOLLOWING FIRST DASH NUMBER INDICATES TORQ-SETS RECESS PER MS33781 SIZES 3, 4, AND 5.

DRILL:

CODE LETTER “D” FOLLOWING SECOND DASH NUMBER INDICATES DRILLED THREADS.
OVERSIZE: CODE LETTERS “X” OR “Y” FOLLOWING SECOND DASH NUMBER INDICATE REPLACEMENT BOLT. WHEN MORE THAN ONE CODE LETTER IS USED FOLLOWING SECOND DASH NUMBER, ARRANGE LETTERS ALPHABETICALLY.

 

NAS1581

BOLT, 100º FLUSH REDUCED HEAD

 

FIRST DASH NO. THREAD UNJF-3A A DIA MAX B DIA MIN BFORE PLATE PLATED UN- PLATED E MAX(b) H REF(b) M GAGE PROT(c) R RAD T U REF(f) V GAGF DIA Y TIR(d) Z TIR(e) TENSILE STRENGTH LBS. MIN(i)
-3 .1900-32 .3047 .2578 1887
.1881
.1895
.1885
.1895
.1890
.015 .049 .0250
.0210
.020
.010
.363 .050 .2441
.2439
.005 .0040 2,000
-4 .2500-28 .3988 .3504 .2487
.2481
.2495
.2485
.2495
.2490
.015 .063 .0278
.0232
.020
.010
.403 .050 .3315
.3313
.006 .0030 3,700
-5 .3125-24 .4787 .4289 .3112
.3106
.3120
.3110
.3120
.3115
.015 .070 .0305
.0255
.025
.010
.501 .060 .4047
.4045
.007 .0030 5,000
-6 .3750-24 .5662 .5149 .3737
.3181
.3745
.3735
.3745
.3740
.015 .081 .0333
.0277
.030
.015
.594 .060 .4854
.4852
.008 .0025 7,200
-7 (j) -7B 4375-20 .6741 .6047 .4362
.4356
.4370
.4360
.4370
.4365
.022 .100 .0430
.0370
.030
.015
.675 .080 .5697
.5695
.009 .0025 10,000
9,000
-8 .5000-20 .7611 .6901 .4987
.4981
.4995
.4985
.4995
.4990
.022 .111 .0458
.0392
.030
.015
.768 .080 .6499
.6497
.010 .0020 13,500
-9 .5625-18 .8449 .7655 .5607
.5601
.5615
.5605
.5615
.6510
.025 .119 .0515
.0445
.030
.015
.881 .090 .7200
.7198
.010 .0020 17,000
-10 .6250-18 .9329 .8518 .6232
.6226
.6240
.6230
.6240
.6235
.025 .130 .0543
.0467
.030
.015
.981 .090 .8011
.8009
.010 .0020 21,000

 

FIRST DASH NO.

 

RECESS NO.

 

J MAX

W DIA MAX GAGE PENETRATION Recess Torque In. Lbs.

Min

MIN MAX
-3 8 .078 .215 .0480 .0595 37
-4 10 .090 .248 .0560 .0685 50
-5 1/4 .118 .325 .0750 .0890 125
-6 5/16 .122 .357 .0700 .0860 250
-7 3/8 .145 .427 .0850 .1030 430
-8 7/16 .169 .498 .1005 .1205 760
-9 1/2 .193 .568 .1155 .1375 1060
-10 9/16 .217 .638 .1305 .1545 1140

 

 

FIRST DASH NO.

 

RECE- SS NO.

J  

K REF

 

W REF

Recess Torque In. Lbs.

Min

MIN MAX
-3 2 .036 .039 .224 .100 37
-4 3 .042 .045 .300 .110 50
-5 4 .046 .049 .394 .134 125
-6 5 .061 .064 .484 .160 250
-7 6 .066 .070 .571 .198 430
-8 7 .082 .086 .660 .224 760
-9 8 .094 .098 .731 .256 1060
-10 9 .100 .104 .819 .300 1440

MATERIAL:

ALLOY STEEL – 4140 PER MIL-S-5626, 4340 PER MIL-S-5000 OR 8740 PER MIL-S-6049. 6AL-4V TITANIUM ALLOY PER AMS4928 OR AMS4967. A-286 CRES PER AMS5731, AMS7532 OR AMS5737 (SEE “CODE”).

HEAT TREAT:

ALLOY STEEL: 160,000 – 180,000 PSI MINIMUM TENSILE STRENGTH.
A-286 CRES: 160,000 – 180,000 PSI MINIMUM TENSILE STRENGTH.
6AL-4V TL: 160,000 – 180,000 PSI MINIMUM TENSILE STRENGTH.

FINISH:

PASSIVATE PER QQ-P-35 OR CADMIUM PLATE PER QQ-P 416, TYPE II, CLASS 2 OR TYPE II, CLASS 3 (SEE “CODE”).

CODE:

FIRST DASH NUMBER INDICATES NOMINAL DIAMETER IN 16THS. SECOND DASH NUMBER INDICATES GRIP LENGTH IN .0625 INCH INCREMEMNTS. 6
MATERIAL: CODE LETTER “A” FOLLOWING BASIC PART NUMBER INDICATES ALLOY STEEL. CODE LETTER “C” FOLLOWING BASIC PART NUMBER INDICATES A-286 CRES. CODE LETTER “V” FOLLOWING BASIC PART NUMBER INDICATES 6AL-4V TITANIUM.
FINISH: ALLOY STEEL: TYPE II, CLASS 2, 6 CADMIUM PLATE.
A-286 CRES: NO CODE LETTER FOLLOWING SECOND NUMBER INDICATES PASSIVATE.
CODE LETTER “P” FOLLOWING SECOND DASH NUMBER INDICATES TYPE II, CLASS 2, 6 CADMIUM PLATE.
6AL-4V TL: NO FINISH. 6
RECESS: CODE LETTER “H” FOLLOWING FIRST DASH NUMBER INDICATES HI-TORQUE ® RECESS PER MS33750 CODE LETTER “R” FOLLOWING FIRST DASH NUMBER INDICATES TORQ-SET ® RECESS PER MS14191 FOR
SIZES 3, 4 AND 5.
CODE LETTER “T” FOLLOWING FIRST DASH NUMBER INDICATES TORQ-SET ® RECESS PER MS33781 OVERSIZE: CODE LETTER “X” FOLLOWING SECOND DASH NUMBER INDICATES REPLACEMENT BOLT.

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