BOLT - AN7-10A
BOLT - AN7-10A
Bolt - AN7-41A
Bolt - AN7-41A

BOLT - AN7-31A
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BOLT - AN7-31A
Genuine OEM Parts

Description:   BOLT, MACHINE BOLT
Part number:   AN7-31A
Industry Standard Specification:   AIA/NAS NASM3-20

Aeronautical Standard AN7-31A Steel Undrilled Shank & Head Bolt, Machine



Thread Class3A
Thread DirectionRight-hand
Thread Length0.657 inches minimum
Fastener Length3.219 inches nominal
Head StyleHexagon
Head Height0.234 inches minimum and 0.266 inches maximum
Width Between Flats0.615 inches minimum and 0.627 inches maximum
Nominal Thread Diameter0.438 inches
Grip Length2.562 inches nominal
Features ProvidedFinished head
Thread Quantity per Inch20
Minimum Tensile Strength125000 pounds per square inch
Hardness Rating26.0 rockwell C minimum overall and 32.0 rockwell C maximum overall
MaterialSteel comp 4140 overall or steel comp 8740 overall or steel comp 8630 overall or steel comp 8735 overall or steel comp 4130 overall or steel comp 4037 overall
Material Document and ClassificationMIL-S-5626 mil spec 1ST material response overall or MIL-S-6049 mil spec 2ND material response overall or MIL-S-6050 mil spec 3RD material response overall or MIL-S-6098 mil spec 4TH material response overall or MIL-S-6758 mil spec 5TH material response overall or ams 6300 assn std 6TH material response overall
Surface TreatmentCadmium overall or chromate overall
Thread Series DesignatorUNF

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Dimensions (W x H x D) 3.5" x 0.63" x 0.63" Inches
Length 3.5" Inches
Weight 0.005 lb
8130-3 Eligible NO
Available Conditions NE / NS
Country of origin United States of America
FAA Approval Code STD
Grip 2.563" Inches
Hazmat Code Not Applicable
Hazmat(Y/N) N
Material Steel
NSN 5306-00-840-0068
Schedule B 7318.15.2000
Thread 3A-UNF
Total Shelf Life (days) Not Applicable
Type Bolt, Machine Bolt
Units of Measure (UoM) Each
Brand Aeronautical Standard Group Inc
Condition status Depreciated