Basic Latch
Secondary Lock Version
Standard
Secondary Lock With
Reverse Offset Drawhook (P/N 51L120-1X1AA only).
| Material1 | Basic Latch |
Secondary Lock Version |
|||||||
| Part No. | Mounting Method | B Dia. | Weight Per Piece (lbs.) | Part No. | Mounting Method | B Dia. | Weight Per Piece (lbs.) | A Dim. | |
| Steel (Cadmium Plated, Gold Chromate) | 51L1-1-1AA | Mechanical | .148 .140 | 0.11 | 51L1-1X1AA | Mechanical | .148 .140 | 0.12 | 1.02 0.98 |
| 51L1-1H1AA2 | 51L1-1X3AA | .134.128 | |||||||
| 51L1-1-4AA | .162 .156 |
51L1-1X4AA | .162
.156 |
||||||
| 51L1-1XH2AA2 | Weld | N/A | |||||||
| Handle and Base: Steel (Chromium Plated); Other: Steel (Cadmium Plated) | 51L1-1-1AB | .148 .140 |
51L1-1X1AB |
Mechanical | .148 .140 | ||||
| 51L1-1-4AB | .162
.156 |
51L1-1X4AB | .162
.156 |
||||||
| Base: Steel (Zinc
Plated); Other: Steel (Cadmium Plated) |
51L1-1-2AC |
Weld |
N/A |
51L1-1X2AC |
Weld |
N/A |
|||
| Steel (Phosphate Coated) | 51L1-1-3AG | Mechanical | .134
.128 |
51L1-1X3AG3 | Mechanical | .134
.128 |
|||
| Stainless Steel
(Passivated) |
51L1-1-1BF | .148
.140 |
51L1-1X1BF4 | .148
.140 |
|||||
| 51L1-1-4BF | .162
.156 |
51L1-1X4BF4 | .162
.156 |
||||||
| 51L1-1-2BF | Weld | N/A | 51L1-1X2BF4 | Weld | N/A | ||||
|
– |
– |
– |
– |
51L120-1X1AA5 |
Mechanical |
.148 .140 |
|||
| 51L120-1X2AA5 | |||||||||
| Steel (Cadmium, Gold Chromate) Base: Aluminum | 51L5-1-1AA | Mechanical | .148
.140 |
0.10 |
51L5-1X1AA | Mechanical | .148
.140 |
0.11 | 1.14
1.10 |
| 51L5-1-2AA | Weld | N/A | 51L5-1X2AA | Weld | N/A | ||||
Notes: 1. Unless otherwise specified, secondary lock versions are supplied with a Zinc Die Cast catch.
2. P/N’s 51L1-1H1AA and 51L1-1XH2AA are supplied with safety wire hole.
3. P/N 51L1-1X3AG, secondary lock version, supplied with
Cadmium Plated, Clear Chromate catch.
4. P/N’s 51L1-1X1BF, -1X4BF, -1X2BF, secondary lock versions, supplied with Chromium Plated catch.
Specification:
Material: See table.
Strength: 500 pounds ultimate; 350 pounds working.
Operating Action: Under-Center.
Adjustment: Threaded drawhook: up to .300 inches.
Take-up: .500 inches minimum.
Reverse Base Latches.
Top View
Specifications:
Material: See table.
Strength: 500 pounds ultimate; 350 pounds working.
Operating Action: Under-Center.
Adjustment: Threaded drawhook: up to .300 inches.
Take-up: .500 inches minimum.
Regular Version
Regular Version Lift Spring
Secondary Lock Version
Hasp Version
| Material1 | Regular Version | Secondary Lock Version | Hasp Version | ||||||
| Part No. | B Dia. | Weight Per Piece (lbs.) | Part No. | B. Dia. | Weight Per Piece (lbs.) | Part No. | A Dia. | Weight Per Piece (lbs.) | |
| Steel (Cadmium Plated, Gold Chromate) | 51L3-1-1AA | .148/.140 | 0.11 | 51L3-1X1AA | .148/.140 | 0.12 | 51L109-1-1AA | .136/.128 | 0.12 |
|
51L109-2-1AA |
.148/.140 | ||||||||
| Handle & Base: Steel (Chromium Plated); Other: Steel (Cadmium Plated, Clear Chromate) | 51L3-1-1AB | 51L3-1X1AB | |||||||
| Stainless Steel (Passivated) | 51L3-1-1BC | 51L3-1X1BC | 51L109-1-1BB | .136/.128 | 0.12 | ||||
| 51L3-1-2BC2 | |||||||||
| 51L3-3-2BC2 | .136/.128 | 51L109-2-1BB | .148/.140 | ||||||
Notes: 1. Secondary lock versions are supplied with a Zinc die cast catch.
2. P/N’s 51L3-1-2BC and 51L-3-3-2BC are supplied with lift
Strikes.
| Material | Part No. | Mounting Method | A Dia. |
| Steel (Cadmium Plated, Gold Chromate) | 51L7-1AA | Mechanical | .148/.140 |
| Steel (Chromium Plated) | 51L7-1AB | ||
| Steel (Zinc Plated) | 51L7-2AC* | Weld | N/A |
| Steel (Oil Coated) | 51L7-3AG | Mechanical | .134/.128 |
| 51L7-1AG |
.148/.140 |
||
| Stainless Steel (Passivated) | 51L7-1BF |
Weight Per Piece (lbs.): 0.10
* Caution: Welding heat may reduce strength of strike.
| Material | Part No. | Mounting Method |
| Aluminum | 51L8-1AA | Mechanical |
| 51L8-2AA | Weld |
Weight Per Piece (lbs.): 0.10
Aluminum Version
Regular Version
Wide Base Version
| Material | Part No. | Mounting Method |
| Steel (Cadmium Plated, Gold Chromate) | 51L59-1-1AA | Mechanical |
| Steel (Cadmium Plated, Clear Chromate) | 51L59-1-1AB |
Weight Per Piece (lbs.): 0.02
Panel Preparation and Installation Data
Reverse Base Installation
Mechanical Attachment:
1.Locate and form holes for latch and strike.
Important Note: Please refer to the above illustrations showing correct hole size and location. Note
which strike is to be installed and if the latch has a reverse base.
2.Attach latch and strike with boils or rivets (not supplied).
Weld Attachment:
Locate latch and strike as required and weld in place.
| Part No. Series | Dimensions | |||||
| A Ref. | B Dia. Ref. | C Ref. | D Ref. | 51L7 or 51L8 Strike Selected | 51L59 Strike Selected | |
| E Typ. | E Typ. | |||||
| 51L1 | .562 | Note 1 | N/A | N/A | 1.670 | 1.290 |
| 51L3 | 1.170 | 1.040 | ||||
| 51L5 |
.144 |
1.670 | 1.290 | |||
| 51L37 | 2.926 | 2.550 | ||||
| 51L38 |
.131 |
1.670 | 1.290 | |||
| 51L83 | .460 | .230 | .280 | 2.230 | 1.850 | |
| 51L89 | .562 | .144 | N/A | N/A | 3.230 | 2.850 |
| 51L109 | Note 1 | 1.170 | 1.040 | |||
| 51L120 | .144 | 1.670 | 1.290 | |||
Notes: 1. See applicable table and part number for “B” Diameter.
2. Weld-on versions supplied without
3. 2 holes .144 diameter (2 holes .131 diameter ref. for P/N 51L7-3AG only).