The Screw,close Tolerance, cataloged under National Stock Number 5305-01-338-9348, 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 Div PB Fasteners. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 8 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-338-9348 |
| Primary Part Number | BACB30NN4S17 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners |
| Status | ACTIVE |
| Fastener Length | 1.473 INCHES MINIMUM AND 1.503 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | BAC 5861,CAGEC 81205 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.425 INCHES NOMINAL IN |
| Material Document and Classification | AMS 4928 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.053 INCHES MINIMUM AND 1.073 INCHES MAXIMUM IN |
| Grip Diameter | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | TITANIUM ALLOY UNS R56400 OVERALL |
| Head Diameter | 0.465 INCHES MINIMUM AND 0.510 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 |
|---|---|
| BACB30NN4S17 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACB30NN4S17 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| BACB30NN4S17 | Huck International, Inc (USA) |
| BACB30NN4S17 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| BACB30NN4S17 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BACB30NN4S17 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACB30NN4S17 | Howmet Global Fastening Systems Inc (USA) |
| BACB30NN4S17 | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| BACB30NN4S17 | 3/2 Design control — primary reference U.S. Government activity |
| BACB30NN4S17 | 5/2 Secondary reference U.S. Government activity |
| BACB30NN4S17 | 5/2 Secondary reference U.S. Government activity |
| BACB30NN4S17 | 5/2 Secondary reference U.S. Government activity |
| BACB30NN4S17 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-338-9348 is a Screw,close Tolerance, manufactured by Sps Technologies Llc Dba PB Fasteners Div PB Fasteners, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-338-9348 has 8 manufacturer part numbers on file: BACB30NN4S17 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), BACB30NN4S17 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), BACB30NN4S17 (Huck International, Inc), BACB30NN4S17 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), BACB30NN4S17 (Sps Technologies, Llc Dba PB Fasteners) and 3 more.
Key specifications for BACB30NN4S17: Fastener Length: 1.473 INCHES MINIMUM AND 1.503 INCHES MAXIMUM IN; Surface Treatment Document and Classification: BAC 5861,CAGEC 81205 MFR REF SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.425 INCHES NOMINAL IN; Material Document and Classification: AMS 4928 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 16 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.