BULK FASTENERS
Studs Part No.
Dia.
Length
Fine Thread Length Coarse Thread Length Qty.
1/2" Studs with Internal Hex ARPAR2.750-1LB
1/2" 1/2" 1/2" 1/2" 1/2" 1/2" 1/2" 1/2" 1/2" 1/2" 1/2" 1/2" 1/2" 1/2" 1/2" 1/2" 1/2" 1/2"
2.750" 3.620" 4.060" 4.250" 4.400" 4.620" 4.750" 5.000" 5.250" 5.310" 5.400" 5.750" 6.120" 6.500" 7.000" 7.500" 8.500" 9.000" 3.250" 3.400" 3.800" 6.600" 5.250" 5.870" 6.500" 7.000" 7.450"
1.250" 1.250" 1.250" 1.250" 1.250" 1.250" 1.250" 1.250" 1.250" 1.250" 1.250" 1.250" 1.250" 1.250" 1.250" 1.250" 1.250" 1.250"
1.250" 1.250" 1.250" 1.250" 1.250" 1.250" 1.250" 1.250" 1.250" 1.250" 1.250" 1.250" 1.250" 1.250" 1.250" 2.000" 1.250" 1.000"
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
ARPAR3.620-1LB ARPAR4.060-1LB ARPAR4.250-1LB ARPAR4.400-1LB ARPAR4.620-1LB ARPAR4.750-1LB ARPAR5.000-1LB ARPAR5.250-1LB ARPAR5.310-2GB ARPAR5.400-1LB ARPAR5.750-1LB ARPAR6.120-1LB ARPAR6.500-1LB ARPAR7.000-1LB ARPAR7.500-1LGB † ARPAR8.500-1LB ARPAR9.000-1SB
ARPAR2.750-1LB
† With guided nose on coarse thread end. 1/2" Stud Broached ARPAR3.250-1LB
1/2" 1/2" 1/2" 1/2"
— — — —
— — — —
ARPAR3.250-1LB
ARPAR3.400-1LB ARPAR3.800-1LB ARPAR6.600-1LGB
9/16" Studs with Internal Hex ARPAQ5.250-1LB 9/16"
1.250" 1.250" 1.250" 1.250" 1.250"
1.250" 1.250" 1.250" 1.250" 1.250"
ARPAQ5.870-1LB ARPAQ6.500-1LB ARPAQ7.000-1LB ARPAQ7.450-1LB
9/16" 9/16" 9/16" 9/16"
12mm x 1.50 Studs with Internal Hex ARPAU3.965-1LB 12mm
3.965" 6.115"
1.000" 1.000"
1.000" 1.000"
1 1
ARPAU3.965-1LB
ARPAU6.115-1B
12mm
Thread
OAL Length
4 - Pack Part No.
10 - Pack Part No.
16 - Pack Part No.
8mm x 1.25 Stainless Steel Stud with 12-pt. Nuts/ Washers & Internal Hex 8mm x 1.25 32mm ARP400-8001 ARP400-8021 — 8mm x 1.25 38mm ARP400-8002 ARP400-8022 ARP400-8032 8mm x 1.25 45mm ARP400-8003 ARP400-8023 ARP400-8033 8mm x 1.25 51mm ARP400-8004 ARP400-8024 ARP400-8034 8mm x 1.25 57mm ARP400-8005 ARP400-8025 —
Miscellaneous Specialty Bulk Fasteners
Dia. & Thread Pitch Length
Fine Thread Length
Coarse Thread Length
Stepped Thread Dia. & Length
Part No.
Description
Qty.
ARPAL1.500-5G
1/4"-20 1.500" Valve Cover Stud with Bullet Guide Nose
0.625" 1.250" 1.250"
0.250" 1.250" 1.250"
—
1 1 1 1 1 1 1 1
ARPRWS-1B ARPRWS-8B
1/2"-13 6.000"
Stepped Main Stud for Windage Tray
3/8-24 x 1.500" 3/8-24 x 0.750"
1/2"-13 5.250" Ford Stepped Main Stud for Windage Tray
ARPHAP3.960-5 ARPHAP4.500-5
7/16"-14 3.960" 7/16"-14 4.500"
6-Pt. Head Bolt 6-Pt. Head Bolt
— —
— — — —
— — — —
ARP4AP1.550-2LU 7/16"-20 1.550" ARP4AP1.601-2LU 7/16"-20 1.601"
12-Pt. Rod Bolt - 2000 Series 12-Pt. Rod Bolt - 2000 Series
0.562" 0.500"
ARPAJG1.750-1G
3/8"-16 1.750"
Header Stud
.750"
.750"
5/16"-18
581 2021-22 ENGINE BUILDER CATALOG
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