The Screw,close Tolerance, cataloged under National Stock Number 5305-01-116-9174, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies, Llc Dba PB Fasteners. Government technical data includes 18 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through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-116-9174 |
| Primary Part Number | HT4057-3-7A |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Fastener Length | 0.829 INCHES MINIMUM AND 0.859 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-C-83488 TY2 CL3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.428 INCHES MINIMUM AND 0.449 INCHES MAXIMUM IN |
| Material Document and Classification | 23-112 FSCM 76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Features Provided | CETYL ALCOHOL LUBRICANT |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.428 INCHES MINIMUM AND 0.449 INCHES MAXIMUM IN |
| Grip Diameter | 0.1885 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Surface Treatment | ALUMINUM 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 | 32 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.338 INCHES MINIMUM AND 0.381 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 |
|---|---|
| HT4057-3-7A | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| HT4057-3-7A PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HT4057-3-7A PRIMARY | Hi-Shear Corporation (USA) |
| WC4057-3-7 | West Coast Aerospace, Inc. (USA) |
| 11935-3L7 | Reid Products Inc. Dba Reid Products Inc (USA) |
| ST3M733-3L7 | Heartland Precision Fasteners Inc (USA) |
| ST3M733-3L7 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| HT4057-3-7A | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M733-3L7 | Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc (USA) |
| HT4057-3-7A | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M733-3L7 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| ST3M733-3L7 | Houston Precision Fasteners I Lp (USA) |
| HT4057-3-7A PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4057-3-7A | Howmet Global Fastening Systems Inc (USA) |
| ST3M733-3L7 PRIMARY | The Boeing Company Div Defense (USA) |
| HT4057-3-7A | Huck International, Inc (USA) |
| Reference | Meaning |
|---|---|
| CHT4057-3-7 | 5/9 Secondary reference U.S. Government activity |
| HT4057-3-7 | 5/9 Secondary reference U.S. Government activity |
| HT4057-3-7A | 3/2 Design control — primary reference U.S. Government activity |
| ST3M733-3-7 | 5/9 Secondary reference The Boeing Company Div Defense |
| HT4057-3-7A | 5/9 Secondary reference U.S. Government activity |
| HT4057-3-7 | 5/9 Secondary reference U.S. Government activity |
| HT4057-3-7 | 5/9 Secondary reference Hi-Shear Corporation |
| HT4057-3-7A | 5/9 Secondary reference U.S. Government activity |
| CHT4057-3-7 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
NSN 5305-01-116-9174 is a Screw,close Tolerance, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-116-9174 has 16 manufacturer part numbers on file: HT4057-3-7A (Sps Technologies Ltd, Tj Brooks Division), HT4057-3-7A (Sps Technologies, Llc Dba PB Fasteners), HT4057-3-7A (Hi-Shear Corporation), WC4057-3-7 (West Coast Aerospace, Inc.), 11935-3L7 (Reid Products Inc. Dba Reid Products Inc) and 11 more.
Key specifications for HT4057-3-7A: Fastener Length: 0.829 INCHES MINIMUM AND 0.859 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-C-83488 TY2 CL3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.428 INCHES MINIMUM AND 0.449 INCHES MAXIMUM IN; Material Document and Classification: 23-112 FSCM 76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL. 18 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.