PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

31101Screw,cap,socket Head

Bowmar Llc Dba Bowmar Instrument Corp · NSN 5305-01-045-9551 · FSC 5305 · No Item Name Available
Verified by PartsTable
NSN 5305-01-045-9551 — this item is cataloged by the U.S. Government under National Stock Number 5305-01-045-9551. Primary manufacturer part number: 31101.
Features
  • Screw,cap,socket Head — FSC 5305
  • Nominal Thread Diameter: 0.112 INCHES IN
  • Fastener Length: 0.280 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
  • Thread Direction: RIGHT-HAND
  • Thread Length: 0.230 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
  • Head Height: 0.056 INCHES MINIMUM AND 0.063 INCHES MAXIMUM IN
  • Head Diameter: 0.223 INCHES MINIMUM AND 0.235 INCHES MAXIMUM IN
  • Thread Class: 2A A
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Comp 301 or Steel Comp 302 or Steel Comp 304 Overall construction
General Description

The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-045-9551, is classified within Federal Supply Class 5305 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Bowmar Llc Dba Bowmar Instrument Corp. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5305-01-045-9551
Primary Part Number31101
Item NameScrew,cap,socket Head
FSC / FSG5305 / 53 — No Item Name Available
ManufacturerBowmar Llc Dba Bowmar Instrument Corp
StatusACTIVE
Nominal Thread Diameter0.112 INCHES IN
Fastener Length0.280 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
Thread DirectionRIGHT-HAND
Thread Length0.230 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
Head Height0.056 INCHES MINIMUM AND 0.063 INCHES MAXIMUM IN
Head Diameter0.223 INCHES MINIMUM AND 0.235 INCHES MAXIMUM IN
Thread Class2A A
Surface TreatmentPASSIVATE OVERALL
Head StyleBINDING
Thread Quantity Per Inch40
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
Internal Drive StyleSLOT
MaterialSTEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 304 OVERALL
Locking FeatureSTRIP THREADS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3040-00-050-873713211E3110-1 INTERCHANGEABLE
Shaft,straight
Cecom Lr Center
6685-00-057-8432 INTERCHANGEABLE
Pyrometer,indicating
5910-00-107-66503110-1 INTERCHANGEABLE
Capacitor,fixed,ceramic Dielectr
Hickok Waekon Llc
5136-00-239-2762 INTERCHANGEABLE
Die,thread Cutting
9320-00-580-5414 INTERCHANGEABLE
Rubber Sheet,solid
4240-00-871-6267201 INTERCHANGEABLE
Guard,foot,industrial
Ellwood Safety Appliance Co., Inc.
6665-00-940-9620 INTERCHANGEABLE
Radiac Set
5330-01-244-758931101 INTERCHANGEABLE
Gasket
Flowserve Inc
3415-01-315-983531101 INTERCHANGEABLE
Hose,grinding Machine
Abb Motors & Mechanical Inc Div Abb Motors and Mechanical Inc.
5305-01-381-1455PWA70141-21 INTERCHANGEABLE
Setscrew
Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney
Cross-Reference Index
Part NumberManufacturer
LL57M40S5 Long-Lok, Llc (USA)
31101 PRIMARY Bowmar Llc Dba Bowmar Instrument Corp (USA)
Related Parts
3040-00-050-8737INTERCHANGEABLE
SHAFT,STRAIGHT
13211E3110-1
6685-00-057-8432INTERCHANGEABLE
PYROMETER,INDICATING
5910-00-107-6650INTERCHANGEABLE
CAPACITOR,FIXED,CERAMIC DIELECTR
3110-1
5136-00-239-2762INTERCHANGEABLE
DIE,THREAD CUTTING
9320-00-580-5414INTERCHANGEABLE
RUBBER SHEET,SOLID
4240-00-871-6267INTERCHANGEABLE
GUARD,FOOT,INDUSTRIAL
201
6665-00-940-9620INTERCHANGEABLE
RADIAC SET
5330-01-244-7589INTERCHANGEABLE
GASKET
31101
3415-01-315-9835INTERCHANGEABLE
HOSE,GRINDING MACHINE
31101
5305-01-381-1455INTERCHANGEABLE
SETSCREW
PWA70141-21
6515-01-419-6388INTERCHANGEABLE
HANDLE,COUNTERSINK,MAXILLOFACIAL
311.01
5340-01-585-9636INTERCHANGEABLE
MOUNT,RESILIENT,UTILITY

Frequently Asked Questions

What is NSN 5305-01-045-9551?

NSN 5305-01-045-9551 is a Screw,cap,socket Head, manufactured by Bowmar Llc Dba Bowmar Instrument Corp, classified under FSC 5305 (No Item Name Available). Status: active.

What are the part numbers for NSN 5305-01-045-9551?

NSN 5305-01-045-9551 has 2 cross-referenced part numbers: LL57M40S5 (Long-Lok, Llc), 31101 (Bowmar Llc Dba Bowmar Instrument Corp).

What NSN replaces 5305-01-045-9551?

There are 12 known substitutes for 5305-01-045-9551: 3040-00-050-8737, 6685-00-057-8432, 5910-00-107-6650 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 31101?

Key specifications for 31101: Nominal Thread Diameter: 0.112 INCHES IN; Fastener Length: 0.280 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN; Thread Direction: RIGHT-HAND; Thread Length: 0.230 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN. 15 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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