The Screw,close Tolerance, cataloged under National Stock Number 5305-01-173-3603, 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 9 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-173-3603 |
| Primary Part Number | ST3M713-3-4-1 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Fastener Length | 0.511 INCHES MINIMUM AND 0.541 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.251 INCHES MINIMUM AND 0.301 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | OVAL COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN |
| Grip Diameter | 0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE 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 COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.2966 INCHES MINIMUM AND 0.3016 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 |
|---|---|
| ST3M713-3-4-1 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HT4048-3-4 | Howmet Global Fastening Systems Inc (USA) |
| ST3M713-3-4-1 | Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc (USA) |
| HT4048-3-4 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| HT4048-3-4 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| WC4048-3-4 | West Coast Aerospace, Inc. (USA) |
| HT4048-3-4 | Hi-Shear Corporation (USA) |
| HT4048-3-4 | Huck International, Inc (USA) |
| ST3M713-3-4-1 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| HT4048-3-4 | 5/9 Secondary reference Sps Technologies Inc |
| HT4048-3-4 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| HT4048-3-4 | 5/9 Secondary reference U.S. Government activity |
| HT4048-3-4 | 5/2 Secondary reference U.S. Government activity |
| HT4048-3-4 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-173-3603 is a Screw,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-173-3603 has 9 manufacturer part numbers on file: ST3M713-3-4-1 (Fastener Innovation Technology, Inc. Dba F I T), HT4048-3-4 (Howmet Global Fastening Systems Inc), ST3M713-3-4-1 (Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc), HT4048-3-4 (Sps Technologies Ltd, Tj Brooks Division), HT4048-3-4 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc) and 4 more.
Key specifications for ST3M713-3-4-1: Fastener Length: 0.511 INCHES MINIMUM AND 0.541 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.251 INCHES MINIMUM AND 0.301 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.