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BACS18F40B — NUT SPACER,PLATE

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

BACS18F40B: NUT SPACER,PLATE.

The NUT SPACER,PLATE is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2024 OVERALL, nut_style: PLATE NUT SPACER, nut_length: 0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN, plate_width: 0.430 INCHES MINIMUM AND 0.450 INCHES MAXIMUM IN, plate_thickness: 0.385 INCHES MINIMUM AND 0.405 INCHES MAXIMUM IN, thru-hole_diameter: 0.192 INCHES MINIMUM AND 0.202 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-701-1297, 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
BACS18F40B
NSN: 5310-00-701-1297
FSC: 5310 — Nuts and Washers
CAGE: 81205 — THE BOEING COMPANY DIV DEFENSE (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2024 OVERALL
nut_stylePLATE NUT SPACER
nut_length0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN
plate_width0.430 INCHES MINIMUM AND 0.450 INCHES MAXIMUM IN
plate_thickness0.385 INCHES MINIMUM AND 0.405 INCHES MAXIMUM IN
thru-hole_diameter0.192 INCHES MINIMUM AND 0.202 INCHES MAXIMUM IN
mounting_hole_diameter0.200 INCHES NOMINAL IN
nut_mounting_provisionCOUNTERSUNK HOLES
mounting_provision_locationOPPOSITE NUT PROJECTION SIDE
mounting_hole_arrangement_style2 HOLES
mounting_hole_countersink_angle100.00 DEGREES NOMINAL
material_document_and_classificationQQ-A-250/5 TEMPER T3 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-250/5 TEMPER T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-701-1297
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: BACS18F40B · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
PLATE THICKNESS: 0.385 INCHES MINIMUM AND 0.405 INCHES MAXIMUM IN
•
NUT LENGTH: 0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN
•
PLATE WIDTH: 0.430 INCHES MINIMUM AND 0.450 INCHES MAXIMUM IN
•
MOUNTING HOLE ARRANGEMENT STYLE: 2 HOLES
•
MOUNTING HOLE COUNTERSINK ANGLE: 100.00 DEGREES NOMINAL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-250/5 TEMPER T3 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-250/5 TEMPER T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
MOUNTING HOLE DIAMETER: 0.200 INCHES NOMINAL IN
•
MOUNTING PROVISION LOCATION: OPPOSITE NUT PROJECTION SIDE
TECHNICAL CHARACTERISTICS
PLATE THICKNESS0.385 INCHES MINIMUM AND 0.405 INCHES MAXIMUM IN
NUT LENGTH0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN
PLATE WIDTH0.430 INCHES MINIMUM AND 0.450 INCHES MAXIMUM IN
MOUNTING HOLE ARRANGEMENT STYLE2 HOLES
MOUNTING HOLE COUNTERSINK ANGLE100.00 DEGREES NOMINAL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-250/5 TEMPER T3 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-250/5 TEMPER T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MOUNTING HOLE DIAMETER0.200 INCHES NOMINAL IN
MOUNTING PROVISION LOCATIONOPPOSITE NUT PROJECTION SIDE
DISTANCE FROM APERTURE CENTER TO MOUNTING HOLE CENTER0.339 INCHES MINIMUM AND 0.349 INCHES MAXIMUM IN
CENTER TO CENTER DISTANCE BETWEEN MOUNTING HOLES ALONG LENGTH0.682 INCHES MINIMUM AND 0.692 INCHES MAXIMUM IN
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES 2
295925-40Reference document
Same NSN cross-reference
Reference document — Secondary reference
BACS18G40BReference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is BACS18F40B?
BACS18F40B is a NUT SPACER,PLATE.
What parts can replace BACS18F40B?
There are 2 known substitutes for BACS18F40B: 295925-40, BACS18G40B. Substitute compatibility should be verified for your specific system.
What is the NSN for BACS18F40B?
BACS18F40B is cataloged in the U.S. Government catalog under NSN 5310-00-701-1297. 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.