The Screw,close Tolerance, cataloged under National Stock Number 5305-01-131-2934, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 16 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-131-2934 |
| Primary Part Number | ST3M733-5L11 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Fastener Length | 1.204 INCHES MINIMUM AND 1.234 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-C-83488 TYPE 2 CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.506 INCHES MINIMUM AND 0.556 INCHES MAXIMUM IN |
| Material Document and Classification | 23-112 FSCM 76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.678 INCHES MINIMUM AND 0.698 INCHES MAXIMUM IN |
| Grip Diameter | 0.3110 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN |
| Surface Treatment | ALUMINUM AND CHROMATE OVERALL |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.575 INCHES MINIMUM AND 0.635 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| ST3M733-5L11 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| ST3M733-5L11 PRIMARY | The Boeing Company Div Defense (USA) |
| ST3M733-5L11 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| CHT4057-5-11 | Howmet Global Fastening Systems Inc (USA) |
| HT4057-5-11A | Hi-Shear Corporation (USA) |
| ST3M733-5L11 | West Coast Aerospace, Inc. (USA) |
| HT4057-5-11A | Howmet Global Fastening Systems Inc (USA) |
| ST3M733-5L11 | Reid Products Inc. Dba Reid Products Inc (USA) |
| ST3M733-5L11 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M733-5L11 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| ST3M733-5L11 | Houston Precision Fasteners I Lp (USA) |
| ST3M733-5L11 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| HT4057-5-11A | Huck International, Inc (USA) |
| ST3M733-5L11 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| HT4057-5-11A | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M733-5L11 | Heartland Precision Fasteners Inc (USA) |
| Reference | Meaning |
|---|---|
| HT4057-5-11 | 5/9 Secondary reference U.S. Government activity |
| CHT4057-5-11 | 5/9 Secondary reference U.S. Government activity |
| HT4057-5-11A | 5/9 Secondary reference U.S. Government activity |
| HT4057-5-11 | 5/9 Secondary reference Hi-Shear Corporation |
| HT4057-5-11 | 5/9 Secondary reference U.S. Government activity |
| HT4057-5-11A | 5/2 Secondary reference U.S. Government activity |
| ST3M733-5-11 | 5/9 Secondary reference The Boeing Company Div Defense |
| HT4057-5-11A | 5/9 Secondary reference U.S. Government activity |
| 10115278 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5305-01-131-2934 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-131-2934 has 16 manufacturer part numbers on file: ST3M733-5L11 (Sps Technologies Ltd, Tj Brooks Division), ST3M733-5L11 (The Boeing Company Div Defense), ST3M733-5L11 (Sps Technologies, Llc Dba PB Fasteners), CHT4057-5-11 (Howmet Global Fastening Systems Inc), HT4057-5-11A (Hi-Shear Corporation) and 11 more.
Key specifications for ST3M733-5L11: Fastener Length: 1.204 INCHES MINIMUM AND 1.234 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-C-83488 TYPE 2 CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.506 INCHES MINIMUM AND 0.556 INCHES MAXIMUM IN; Material Document and Classification: 23-112 FSCM 76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL. 17 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.