| B = Bayonet Style Bases: |
|
*DC = Double Contact |
| |
*SC = Single Contact |
| |
|
|
| Base Code |
Diameter |
Description |
| B7s |
7mm |
SC Bayonet with small ridges on the sides |
| B9s |
9mm |
Miniature SC Bayonet |
| BA15d |
15mm |
DC Bayonet with 2 "knobs" on the sides near the bottom of the base |
| BA15s |
15mm |
SC Bayonet with 2 "knobs" on the sides near the bottom of the base |
| BAY15d |
15mm |
DC Indexed Bayonet with 2 "knobs" at different heights on the base |
| BA20s |
20mm |
Flange-style SC Bayonet, rectangular cut-out flanges 1/2 way up base cylinder |
| BA20d |
20mm |
Flange-style DC Bayonet, rectangular cut-out flanges 1/2 way up base cylinder |
| B21s |
21mm |
4-knob SC Bayonet |
| B22d |
22mm |
DC Bayonet |
E = Edison Screw Type Bases: |
| |
*Measured outside edge to outside edge on the threaded area |
| |
|
|
| Base Code |
Diameter |
Description |
| E5 |
5mm |
Midget Screw |
| E10 |
10mm |
Miniature Screw |
| E11 |
11mm |
Miniature Candelabra Screw with cone shape beneath threaded area |
| E12 |
12mm |
Candelabra Screw |
| E14 |
14mm |
European Intermediate Screw |
| E17 |
17mm |
Intermediate Screw |
| E26 |
26mm |
Medium Screw |
| E27 |
27mm |
European Medium Screw |
| E29 |
29mm |
Admedium Screw |
| E39 |
39mm |
Mogul Screw |
| E40 |
70mm |
European Mogul Screw |
G = 2, 3, or 4 Pin Type Bases: |
|
*Pin Spread is measured from the center of one pin to the center of the other |
| Base Code |
Pin Spread |
Description |
| G4 |
4mm |
2 Pins, .7mm pin diameter, flattened glass base |
| GU4 |
4mm |
2 Pins, .7mm pin diameter, pins from rectangular back with grooves on MR11 |
| GX4 |
4mm |
2 Pins, .7mm pin diameter, pins from round back on MR11 |
| GZ4 |
4mm |
2 Pins, 1.0mm pin diameter, pins from rectangular back on MR11 |
| G5.3 |
5.3mm |
Ceramic block 2-Pin, 1.56 mm pin diameter |
| GU5.3 |
5.3mm |
2 Pins, .7mm pin diameter, pins from rectangular back with grooves on MR16 |
| GX5.3 |
5.3mm |
2 Round Pins, for Low Volt lamps, 1.53 pin diameter |
| GY5.3 |
5.3mm |
2 Flat Pins, for Line Volt (120V) or High Volt (such as 82 volts) lamps |
| G5.3-4.8 |
5.3mm |
2 Flat Blades that are 4.8mm wide x .5mm thick |
| G6.35 |
6.35mm |
2 Pins, 1.0mm diam pins, flattened glass |
| G6.35-13 |
6.35mm |
2 Pins, 1.0mm diam pins, 13mm width flattened glass |
| G6.35-15 |
6.35mm |
2 Pins, 1.0mm diam pins, 15mm width flattened glass |
| G6.35-20 |
6.35mm |
2 Pins, 1.0mm diam pins, 20mm width flattened glass |
| G6.35 Ceramic |
6.35mm |
2 Pins, Ceramic Seal Cover, 1.0mm diam pins, small ceramic cover over flat glass |
| G6.35/15x19 |
6.35mm |
2 Pins, 1.6mm pin diameter, 15mm x 19mm ceramic block |
| G6.35/19x19 |
6.35mm |
2 Pins, 1.6mm pin diameter, 19mm x 19mm ceramic block |
| GY6.35 |
6.35mm |
2 pins, 1.25mm diam pins, flattened glass |
| GY6.35-13 |
6.35mm |
2 Pins, 1.25mm diam pins, 13mm width flattened glass |
| GY6.35-15 |
6.35mm |
2 Pins, 1.25mm diam pins, 15mm width flattened glass |
| GZ6.35 |
6.35mm |
2 Pins, 1.00mm diam pins, from back of MR16 lamp |
P = Prefocus Type Bases: |
| Base Code |
Diameter |
Description |
| P28s |
28mm |
Medium Prefocus, 2 different-sized flanges, single contact |
| P30s |
30mm |
Candelabra Prefocus base, single contact, circular flange w/ 3 slots |
| P30d |
30mm |
Candelabra Prefocus base, double contact, circular flange w/ 3 slots |
| P35s |
35mm |
Prefocus base, flange with 4 square blades, see our catalog p. 18 for diagram |
| P40s |
40mm |
Mogul Prefocus base, 2 same-sized flanges, single contact |
| P46s |
46mm |
Bell & Howell Small Indexing Ring, flange in complete circle |
| P46L |
46mm |
Bell & Howell Large Indexing Ring |
R = Recessed Contact Type Bases: |
| Base Code |
Diameter |
Description |
| R7s |
7mm |
Recessed Single Contact, ceramic ends w/bowl-shaped contact inside each end |
| R7s-12 |
7mm-12mm |
Recessed Single Contact, 7mm ceramic ends w/bowl-shaped contact inside each end with flattened glass 12mm wide |
| R7s-15 |
7mm-15mm |
same as R7s-12 except flattened glass 15mm wide |
| R7s-18 |
7mm-18mm |
same as R7s-12 except flattened glass 18mm wide |
| R7s-21 |
7mm-21mm |
same as R7s-12 except flattened glass 21mm wide |
Miscellaneous Base Types: |
| Base Code |
Description |
| Pico |
9 Pins arranged in a circle |
| P14s |
H1 Base, special shape, see our catalog p. 18 for diagram |
| PK22s |
H3 Base, special shape, see our catalog p. 18 for diagram, 1 wire with eyelet |
| PKY22s |
H3 Base, special shape, see our catalog p. 18 for diagram, 1 wire with plug |
| PG22-6.35 |
2 Pins w/6.35mm diameter, 22mm pin spacing, circular flange w rectangle cutout |
| X511 |
H2 base, special shape, see our catalog p. 18 for diagram |
