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STD1231-12B — LOCKING PLATE,NUT AND BOLT

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

STD1231-12B: LOCKING PLATE,NUT AND BOLT.

The LOCKING PLATE,NUT AND BOLT is a the manufacturer industrial component. Key specifications include material: STEEL, plate_thickness: 0.028 INCHES NOMINAL IN, cross-sectional_shape_style: FLAT, distance_between_mounting_hole_centers: 0.560 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-467-7220, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
STD1231-12B
NSN: 5340-00-467-7220
FSC: 5340 — Hardware, Commercial
CAGE: U9143 — BAE SYSTEMS (OPERATIONS) LIMITED (GBR)
SPECIFICATIONS
materialSTEEL
plate_thickness0.028 INCHES NOMINAL IN
cross-sectional_shape_styleFLAT
distance_between_mounting_hole_centers0.560 INCHES NOMINAL IN
NSN5340-00-467-7220
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: STD1231-12B MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
PLATE THICKNESS: 0.028 INCHES NOMINAL IN
•
DISTANCE BETWEEN MOUNTING HOLE CENTERS: 0.560 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: FLAT
•
MATERIAL: STEEL
TECHNICAL CHARACTERISTICS
PLATE THICKNESS0.028 INCHES NOMINAL IN
DISTANCE BETWEEN MOUNTING HOLE CENTERS0.560 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLEFLAT
MATERIALSTEEL
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES 1
99-6038980Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is STD1231-12B?
STD1231-12B is a LOCKING PLATE,NUT AND BOLT.
What parts can replace STD1231-12B?
There is 1 known substitute for STD1231-12B: 99-6038980. Substitute compatibility should be verified for your specific system.
What is the NSN for STD1231-12B?
STD1231-12B is cataloged in the U.S. Government catalog under NSN 5340-00-467-7220. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.