The Screw,close Tolerance, cataloged under National Stock Number 5305-01-231-7422, 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 14 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-231-7422 |
| Primary Part Number | ST3M733-6L-9 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Fastener Length | 1.188 INCHES MINIMUM AND 1.218 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-C-83488,TY 2 CL 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.616 INCHES MINIMUM AND 0.666 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.374 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM IN |
| Grip Diameter | 0.3735 INCHES MINIMUM AND 0.3745 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 COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.692 INCHES MINIMUM AND 0.763 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 |
|---|---|
| ST3M733-6L-9 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| HT4057-6-9A | Hi-Shear Corporation (USA) |
| HT4057-6-9A | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M733-6L-9 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M733-6L-9 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| ST3M733-6L9 | Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc (USA) |
| ST3M733-6L9 | Reid Products Inc. Dba Reid Products Inc (USA) |
| ST3M733-6L-9 | Heartland Precision Fasteners Inc (USA) |
| ST3M733-6L-9 PRIMARY | The Boeing Company Div Defense (USA) |
| ST3M733-6L-9 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M733-6L-9 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M733-6L-9 | West Coast Aerospace, Inc. (USA) |
| ST3M733-6L-9 | Houston Precision Fasteners I Lp (USA) |
| ST3M733-6L-9 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| HT4057-6-9A | 5/2 Secondary reference U.S. Government activity |
| HT4057-6-9A | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| HT4057-6-9A | 5/9 Secondary reference U.S. Government activity |
| HT4057-6-9A | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| ST3M733-6L-9 | 5/2 Secondary reference U.S. Government activity |
| HT4057-6-9A | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-231-7422 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-231-7422 has 14 manufacturer part numbers on file: ST3M733-6L-9 (Sps Technologies Ltd, Tj Brooks Division), HT4057-6-9A (Hi-Shear Corporation), HT4057-6-9A (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), ST3M733-6L-9 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), ST3M733-6L-9 (Fastener Innovation Technology, Inc. Dba F I T) and 9 more.
Key specifications for ST3M733-6L-9: Fastener Length: 1.188 INCHES MINIMUM AND 1.218 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-C-83488,TY 2 CL 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.616 INCHES MINIMUM AND 0.666 INCHES MAXIMUM IN; Material Document and Classification: AMS 5629 ASSN STD 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.